Handheld combustible gas detector



FIG. 1 is a perspective view of a handheld combustible gas detector;

FIG. 2 is a front view of the handheld combustible gas detector;

FIG. 3 is a rear view of the handheld combustible gas detector;

FIG. 4 is a left side view of the handheld combustible gas detector;

FIG. 5 is a right side view of the handheld combustible gas detector;

FIG. 6 is a top view of the handheld combustible gas detector; and,

FIG. 7 is a bottom view of the handheld combustible gas detector.

The broken lines shown in the drawings illustrate environmental structure and from no part of the claimed design. 

The ornamental design for the handheld combustible gas detector, as shown and described. 